Irrifation & Landscape Service. Since 1982, we’ve been providing the best service in landscape and irrigation supplies. Ask any one of our customers in the wholesale irrigation, landscape and lawn maintenance equipment industry. Longhorn, Inc. sets the standard for friendly, knowledgeable, personal service. Our experienced team of courteous professionals is ready to serve you.Whether you are shopping for professional drainage, irrigation, landscape maintenance, lighting, pool & spa, on-site waste water or water well equipment and supplies, count on Longhorn to provide competitive pricing, straight answers and over-the-top service.